can anyone recommend a new differential
#1
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can anyone recommend a new differential
looking to upgrade my 90 miata rear differential.. sick of the one wheel spinning... can anyone recommend what differential will work best...1.5 way or 2 way?? mazdaspeed or kaaz or tomei?? anyone know which one is better for a swap??
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the reason you want to do the 1.8 rear end swap is because its much stronger. In fact, somebody just broke their 1.6 rear end just yesterday. Of course he had more power, but if you are making your wheels spin regularly, I wouldnt expect it to last too long.
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Torsens are so overpriced it's not even funny. You can buy new Kaaz or Cusco LSDs for the price people want for torsens.
1.8 Open rears are cheap, and even buying a used RX7 Clutch-LSD and rebuilding it will be a cheaper build than a torsen swap.
You can even find 86-88 RX7 assemblies with the LSD included. Use miata specific: half-shafts, ring and pinon, pinon housing (pumpkin), & diff mounts. And do a cheaper build.
1.8 Open rears are cheap, and even buying a used RX7 Clutch-LSD and rebuilding it will be a cheaper build than a torsen swap.
You can even find 86-88 RX7 assemblies with the LSD included. Use miata specific: half-shafts, ring and pinon, pinon housing (pumpkin), & diff mounts. And do a cheaper build.
#17
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If you buy a 1.8 rear with a torsen, just keep it as is (or sell the torsen for a good deal of $$$). Really decide what type of LSD you want.
Otherwise you have a few options. Buy a 1.8 open and swap in an LSD (RX7, kaaz, cusco, guru, torsen). or do a RX7 frankenstien coversion:
1.8 open converted to LSD:
Parts:
94-05 1.8 Miata open assembly
84-91 NON-TURBO Rx7 clutch-type lsd (or any LSD you pick)
94-95 Miata stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
94-05 Miata driveshaft
Proceedure:
Open the 1.8 miata & pull the open diff. Bolt the ring gear to the LSD. Drop it in, set the backlash, and reassemble the housing. Swap/install as normal.
86-88 RX7 assembly conversion:
Parts:
86-88 RX7 NON-TURBO differential assembly
94-95 Miata stub shafts or RX7 stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
RX7 Circlips (fit onto the end of the stubs/axles, miata clips will not fit)
94-05 Miata driveshaft
Miata or RX7 ring and pinon (ring teeth / pinon teeth = end-ratio)
Miata Pinon housing (pumpkin) (find at RX7 performance shops)
Miata Diff. Bushings
Proceedure:
Open the RX7 assembly. Decide what ring and pinon to use. Bolt the correct ring gear to the RX7 LSD. Swap the pinon gear and lsd guts to the miata pinon housing. Set the backlash, and assemble the miata pinon housing to the RX7 housing. Drill out the RX7 diff bushings and push in miata specfic bushings. Install as normal.
*note: the 85-85 LSD will fit, however, the housing is not compatable
Otherwise you have a few options. Buy a 1.8 open and swap in an LSD (RX7, kaaz, cusco, guru, torsen). or do a RX7 frankenstien coversion:
1.8 open converted to LSD:
Parts:
94-05 1.8 Miata open assembly
84-91 NON-TURBO Rx7 clutch-type lsd (or any LSD you pick)
94-95 Miata stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
94-05 Miata driveshaft
Proceedure:
Open the 1.8 miata & pull the open diff. Bolt the ring gear to the LSD. Drop it in, set the backlash, and reassemble the housing. Swap/install as normal.
86-88 RX7 assembly conversion:
Parts:
86-88 RX7 NON-TURBO differential assembly
94-95 Miata stub shafts or RX7 stub shafts and 94-95 Miata half-shafts
or 96-05 Miata axles (no stubs needed)
RX7 Circlips (fit onto the end of the stubs/axles, miata clips will not fit)
94-05 Miata driveshaft
Miata or RX7 ring and pinon (ring teeth / pinon teeth = end-ratio)
Miata Pinon housing (pumpkin) (find at RX7 performance shops)
Miata Diff. Bushings
Proceedure:
Open the RX7 assembly. Decide what ring and pinon to use. Bolt the correct ring gear to the RX7 LSD. Swap the pinon gear and lsd guts to the miata pinon housing. Set the backlash, and assemble the miata pinon housing to the RX7 housing. Drill out the RX7 diff bushings and push in miata specfic bushings. Install as normal.
*note: the 85-85 LSD will fit, however, the housing is not compatable
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